1. State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking University, Beijing 100871, China
2. School of Integrated Circuits and Electronics, MIIT Key Laboratory for Low-Dimensional Quantum Structure and Devices, Beijing Institute of Technology, Beijing 100081, China
3. Electron Microscopy Laboratory, School of Physics, Peking University, Beijing 100871, China
4. International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China
5. School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
6. Interdisciplinary Institute of Light-Element Quantum Materials and Research Center for Light-Element Advanced Materials, Peking University, Beijing 100871, China
7. Collaborative Innovation Centre of Quantum Matter, Beijing 100871, China
8. School of Semiconductor Science and Technology, South China Normal University, Foshan 528225, China
9. Yangtze Delta Institute of Optoelectronics, Peking University, Nantong, Jiangsu 226010, China
10. Liaoning Academy of Materials, Shenyang 110167, China